23456556557 has 4 divisors (see below), whose sum is σ = 26807493216. Its totient is φ = 20105619900.

The previous prime is 23456556527. The next prime is 23456556581. The reversal of 23456556557 is 75565565432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23456556557 - 2¹⁸ = 23456294413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23456556499 and 23456556508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23456556527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1675468319 + ... + 1675468332.

It is an arithmetic number, because the mean of its divisors is an integer number (6701873304).

Almost surely, 2^23456556557 is an apocalyptic number.

It is an amenable number.

23456556557 is a deficient number, since it is larger than the sum of its proper divisors (3350936659).

23456556557 is an equidigital number, since it uses as much as digits as its factorization.

23456556557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350936658.

The product of its digits is 18900000, while the sum is 53.

The spelling of 23456556557 in words is "twenty-three billion, four hundred fifty-six million, five hundred fifty-six thousand, five hundred fifty-seven".